package com.itheima.service.system.impl;

import com.itheima.domain.system.SysLog;
import com.itheima.factory.DaoInstanceFactory;
import com.itheima.mapper.system.SysLogMapper;
import com.itheima.service.system.SysLogService;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;

public class SysLogServiceImpl implements SysLogService {

    @Override
    public void save(SysLog sysLog) {
        try {
            DaoInstanceFactory.getMapper(SysLogMapper.class).save(sysLog);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void deleteSel(String ids) {

        if (ids!=null) {

            for (String id : ids.split(",")) {
                //调用dao对象方法
                SysLogMapper mapper = DaoInstanceFactory.getMapper(SysLogMapper.class);
                mapper.delete(id);
            }
        }
    }

    @Override
    public ByteArrayOutputStream getLog() throws IOException {
        SysLogMapper mapper = DaoInstanceFactory.getMapper(SysLogMapper.class);
        List<SysLog> sysLogList=mapper.findAll(null);

        //1.获取到对应的Excel文件，工作簿文件
        Workbook wb = new XSSFWorkbook();
        //2.创建工作表
        Sheet s = wb.createSheet("系统日志文件");
        //设置通用配置
//        s.setColumnWidth(4,100);
        CellStyle cs_field = wb.createCellStyle();
        cs_field.setAlignment(HorizontalAlignment.CENTER);
        cs_field.setBorderTop(BorderStyle.THIN);
        cs_field.setBorderBottom(BorderStyle.THIN);
        cs_field.setBorderLeft(BorderStyle.THIN);
        cs_field.setBorderRight(BorderStyle.THIN);
        //制作标题
        s.addMergedRegion(new CellRangeAddress(1, 1, 1, 7));
        Row row_1 = s.createRow(1);
        Cell cell_1_1 = row_1.createCell(1);
        cell_1_1.setCellValue("在线导出日志");
        //创建一个样式
        CellStyle cs_title = wb.createCellStyle();
        cs_title.setAlignment(HorizontalAlignment.CENTER);
        cs_title.setVerticalAlignment(VerticalAlignment.CENTER);
        cell_1_1.setCellStyle(cs_title);

        //制作表头
        String[] fields = {"ID", "访问时间", "访问用户", "访问IP", "资源URL",
                "执行时间", "访问方法"};
        Row row_2 = s.createRow(2);
        for (int i = 0; i < fields.length; i++) {
            Cell cell_2_temp = row_2.createCell(1 + i); //++
            cell_2_temp.setCellValue(fields[i]);    //++
            cell_2_temp.setCellStyle(cs_field);
        }
        //制作数据区
        int row_index = 0;
        for (SysLog sysLog : sysLogList) {
            int cell_index = 0;
            Row row_temp = s.createRow(3 + row_index++);

            Cell cell_data_1 = row_temp.createCell(1 + cell_index++);
            cell_data_1.setCellValue(sysLog.getId());    //++
            cell_data_1.setCellStyle(cs_field);

            Cell cell_data_2 = row_temp.createCell(1 + cell_index++);
            cell_data_2.setCellValue(sysLog.getVisitTimeStr());    //++
            cell_data_2.setCellStyle(cs_field);

            Cell cell_data_3 = row_temp.createCell(1 + cell_index++);
            cell_data_3.setCellValue(sysLog.getUsername());    //++
            cell_data_3.setCellStyle(cs_field);

            Cell cell_data_4 = row_temp.createCell(1 + cell_index++);
            cell_data_4.setCellValue(sysLog.getIp());    //++
            cell_data_4.setCellStyle(cs_field);

            Cell cell_data_5 = row_temp.createCell(1 + cell_index++);
            cell_data_5.setCellValue(sysLog.getUrl());    //++
            cell_data_5.setCellStyle(cs_field);

            Cell cell_data_6 = row_temp.createCell(1 + cell_index++);
            cell_data_6.setCellValue(sysLog.getExecutionTime());    //++
            cell_data_6.setCellStyle(cs_field);

            Cell cell_data_7 = row_temp.createCell(1 + cell_index++);
            cell_data_7.setCellValue(sysLog.getMethod());    //++
            cell_data_7.setCellStyle(cs_field);
        }
        //将内存中的workbook数据写入到流中
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        wb.write(os);
        wb.close();
        return os;
    }

    @Override
    public List<SysLog> findAll(String visitTime){
        SysLogMapper mapper = DaoInstanceFactory.getMapper(SysLogMapper.class);
        return mapper.findAll(visitTime);
    }
}


